A supercentre is a big-box store, also known as a superstore or megastore, and is a physically large retail establishment—usually part of a chain. The term supercentre sometimes also refers, by extension, to the company that operates the store.
In essence, a supercentre is a supermarket and a department store, under one roof. The result is an expansive retail facility, carrying a wide range of products; these products include a full grocery line and general merchandise.
In theory, a supercentre allows customers to satisfy all their routine shopping needs, in one trip.